Data commit

Task/Look-and-say-sequence/UNIX-Shell/look-and-say-sequence.sh

@@ -0,0 +1,17 @@
+lookandsay() {
+    local num=$1 char seq i
+    for ((i=0; i<=${#num}; i++)); do
+        char=${num:i:1}
+        if [[ $char == ${seq:0:1} ]]; then
+            seq+=$char
+        else
+            [[ -n $seq ]] && printf "%d%s" ${#seq} ${seq:0:1}
+            seq=$char
+        fi
+    done
+}
+
+for ((num=1, i=1; i<=10; i++)); do
+    echo $num
+    num=$( lookandsay $num )
+done